#include <stdio.h>
#include <stdlib.h>
int main()
{
	int diJiTian, qianYiTian = 0, houYiTian;
	diJiTian = 10;
	houYiTian = 1;
	do
	{
		qianYiTian = (houYiTian + 1) * 2; 
        // 前一天的桃子数是后一天桃子数加1后的2倍
		houYiTian = qianYiTian;
		diJiTian--;
	}
	while (diJiTian > 0);
    
	printf("%d", qianYiTian);

	return 0;
}
